Grinding machine



C. W. OLSON.

GRINDING MACHIN E.

APPLICATION FILED FEE.16, 1920.

Patented Aug. 8, 1922.

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3 ywa ntoz CHHELES W. OLSON c. w. OLSON. I GRINDING MACHINE.

APPLICATION FILED FEB. I6 I920- 1 A25, 3 3 1 Patented Aug. 8, 19223.

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amwntoz CHH/QLE5 I V. OLSON (tot mug CHARLES w. OLSON, or DETROIT,

MICHIGAN, ASSIGNOR 'ro ooivrmmvrar, morons GRINDING MACHINE.

To all whom it may concern: 7

.Be it known that I, CHARLns W. OLso'N, a citizen of the United States, residin at Detroit, in the county of Wayne and tate of Michigan, have invented'a new and useful Improvement in Grinding Machines, of

said objects. It frequently happens in connection with manufacturing devices of various kinds, that it is necessary to have the heads of screws particularly, at right angles to the thread of the screws, and that they be accurately ground in this manner. This is particularly true in connection with adjusting screws employed in certain types of internal combustion motors for the urpose of securing the desired accuracy 0 action of the valve mechanism from the cams employed to operate the valves.

It is an object of my present invention to provide a grinding machine by which the heads of screws may be accurately ground at right angles to the threads of the screws and furthermore'that this may be done continuously by providing rotating carrying devices which successively pass different ones of the screws across the grinding face of the grinding wheel employed to face the heads of the screws.

My improved grinding machine includes devices for automatically clutching or engaging the screws to be ground, rotating them as they are being ground and releasing them when they have passed the grinding position as a result of which the operator may remove'the ground screws and insert unground ones without interrupting the operation of the machine.

My invention will be best understood by reference to the accompanying drawings, showing a preferred embodiment thereof in which I Fig. 1 shows my grinding machine in side elevation,

Fig. 2 is an end elevation of the machine shown in Fig. 1,

Fig. 3 is a vertical sectional View to an enlarged scale through the rotatable head shown in Fig. 2 providing for holding the screws or other devices while their heads Spcification of lietters latent.

Patented Aug. 8, 1922.

Application filed February 16, 1920. Serial No. 358,986.

are being ground taken along the line 3-3 in 1g. 4, and

Fig. 4 is a sectional view of the parts showman Flg. 3, taking along the line 4-4.

S milar numerals refer to similar parts throughout the several views. i

As shown in Figs. 1 and 2, my improved mach ne consists essentially of'a housing 10 containing mechanism for supporting and passing the articles to be ground through the grlndlng position, which housing is supported upon guldeways 11 and arranged to be moved alongthese guideways by a feed screw 12. grinding wheel 13 is mounted upon an axis substantially parallel with the guldeways 11, this grinding wheel being mounted 1n a' housing 14 mounted on guideways l 5 at right angles to the direction of the guldeways 11. A handle 16 connected by a suitable shaft arranged to drive a second bevel gear 18 connected with a feed screw 19 for moving the housing 14 and the parts carried thereby upon the guideways 15 so as to move the with a bevel gear 17 is grinding wheel towards or away fromwork I to be ground, as desired. The shaft carrymg the grinding wheel 13 also has secured thereto a pulley 20 engaged by a belt 21 by which the grinding wheel may be rotated.

As more clearly shown in Figs. 3 and 4 the housing 10 contains arotatable head 22 carrying thereon a worm wheel 23 engaged by a worm 24 secured to a shaft 25, by rotation of which the head 22 may be rotated together with the parts carried thereby. The shaft 25 has secured thereto by means of a feather key as indicated, one member 26 of a jaw clutch arranged to be moved upon the shaft as desired to engage or be disengaged from a second jaw clutch member 32 carried by a gear 27, which is freely mounted on the shaft 25, which gear 27 meshes with a pinion 28 secured to a shaft 29 to the other end of which a pulley 30 is secured. As indicated in Figs. 1 and 2 the pulley 30 may be driven by a belt 31 and consequently the parts referred to in the driving train of the head 22 may be rotated by power to move the article to be ground. i ast the grinding face of the wheel 13.-

clutch member 32, or out of engagement with such member as desired. The revolving head 22 carries a plurality of hollow revolvable spindles 37 equidistant from the axis of the revolving head, and each of these spindles carries at its inner end a gear 38 meshing with a gear 39 carried by a central shaft 40, to the end of which shaft a pulley 41 is secured for receiving a belt 42 as shown in Figs. 1 and 2 to drive the rotatable spindles. Each of the spindles 37 contains a spring collet 43, the inner end of which is engaged by a rod 44 extending through the corresponding spindle. The rod 44 has rigidly secured to its inner end a collar 45 which is adapted to slide longitudinally in the spindle 37 and adjacent the inner end of the collet 43, a collar 46 is placed in the spindle 37 and rigidly secured thereto, said collar 46 having a clearance opening therein to permit the passage through said collar of the rod 44. 'A compression spring 47 is lo-' cated between the collars 45 and 46, said spring tending to move the collet 43 inwardly in its spindle to clamp an object which may be placed in said collet. The rod 44 is continued a short distance beyond the collar 45 to engage suitable operating devices. A" cam 48 is carried inside of the housing 10 adjacent the inner ends of the rods 44, said cai'n being conformed so that as the collets move with the revolving head 22 in. the direction indicated by the arrows in Figs. 2 and 4, as they reach the position indicated at 49, the inner ends of the corresponding rods 44 are in engagement with the portion of the cam which pushes said rods against the action of the springs 47, thus movingthe collets 43 outwardly to release the parts held thereby. When the uppermost position of the collets is reached the rods are disengaged from the operating surface of the cam 48 and the springs 47 move the collets 43 inwardly to clamp the devices which may have been placed in them. Immediately after passing the position 50 the heads of the screws or other devices which may have been placed in the collets are en gaged by a cam 51 carried by the housing 10, which cam serves to move the'devices inwardly so that they bottom properly against the ends of the spring collets and thus an accurate thickness of head of the devices is assured as a result of the grinding operation.

From the above description it will appear that by my device I provide means by which screws for example, maybe inserted one after another in the various collets, after being inserted in said collets they are moved with the revolving heads described under the cam 51 which bottoms them in the collets and after this that they move one after another past the grinding wheel 13 during whlch tune they are positively held in the collets by-the springs 47 referred .to, and

that after-passing the grinding position the collets are automatically released by the cam 48 and when in the position indicated at 49 they may be removed by the operator and unground screws inserted to be ground. It

wi 1 also appear that the devices employed for revolving the head 22 by the pulley 30 may be disconnected as desired by operation of the lever 35, as for example, when it is desired to set up the machine for a different kind of screw or other similar device to be ground, and when this is done the squared end 25 of the shaft 25 may be engaged by a suitable handle so that the head 22 may be.

rotated manually until the adjustment of will be understood however that Ido not limit myself to this exact construction in carrying out my invention as I may employ equivalents thereof known to the art at the time of filing this application without departing from the scope of the appended claims.

WVhat I claim is:

1. In a device ofthe class described, the combination of a grinding wheel, a revolvmg head, spring collets carried by said head and movable with said head' past the grinding surface of said wheel, devices carried by said head for holding said collets in clamping position during'the grinding operation, means actuated by rotation of said head for moving said collets to releasing po'sition after passing the grinding position, rotatable spindles carried by said head and containing said collets, and means for rotating said spindles and collets, said spindle rotating meanscomprising a gear carried by each spindle, a central shaft and a gear carried by said shaft meshin with the gears on said spindles, the axes 0 said collets being parallel with said central shaft.

. 2. In adevice of the class described, the

combination of a grinding Wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said wheel, rotatable spindles carried by said head and containing said collets, means for rotating said spindles and collets, push rods extending from said collets through said spindles, springs in said spindles for moving said collets to engaging position, and a cam engaging said push rods during a portion of the rotation of said head to move said collets to releasing position, said spindle rotating means comprising a gear carried by each spindle, a central shaft, and a gear carried by said shaft meshing with the gears on said spindles, the axes of said collets being parallel with said central shaft.

In a device of the class described, the combination of a grinding wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said wheel, devices carried by said head for holding said collets in clamplng position during the grinding operation, means actuated by rotation of said head for moving said collets to releasing position after passing the grinding position, rotatable spindles carried by said head and containing said collets, means for rotating said spindles and collets, said spindle rotatin means comprising a gear carried by each spindle, a central shaft, and a gear carried by said shaft meshing with the gears on said spindles, means including a clutch for rotating said head, and devices for moving said clutch to its engaging or disengaging position as desired.

4. In a device of the class described, the combination of a grinding wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said Wheel, rotatable spindles carried by said head and containing said collets, means for rotating said spindles and collets, push rods extending from said collets through said spindles, springs in said spindlesfor moving said collets to engaging position, a cam engaging said push rods during a portion of the rotation of said head to move said collets to releasing position, said spindle rotating means comprising a gear carried by each spindle, a central shaft, and a gearcarried by said shaft meshing with the gears of said spindles, means includin a clutch for rotating said head, and devices for moving said clutch to its engaging or disengaging posi-' tion as desired.

5. In a device of the class described, the

combination of a grinding Wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said wheel, devices car-' vii riedby said head for holding said collets in clampin position during the grinding operation, means actuated by rotation of said head for moving said collets to releasing position after passing the grinding position, and a cam for seating devices to be ground in said collets by rotation of said head.

6. In a device of the class described, the combination of a grinding wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said wheel, devices carried by said head for holding said collets in a clamping position during the grinding operation, means actuated by rotation of said head for moving said collets to a releasing position after passing the grinding position, rotatable spindles carried by said head and containing said collets, means for rotating said spindles and collets, and a cam for seating devices to be ground in said collets by rotation of said head.

7. In a device of the class described, the combination of a grinding wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said wheel, rotatable spindles carried by said head and containing said collets, means for rotating said spindles and collets, push rods extending from said collets through said spindles, springs in said spindles for moving said collets to engaging position, a cam engaging said push rods during a portion of the rotation of said head to move said collets to releasing position, and a cam for seating devices to be ground in said collets by rotation of said head.

8. A device of the class described, the

combination of a grinding Wheel, a revolving head, spring collets carried by said head and movable with said head past the grinding surface of said Wheel, devices carried by said head for holding said collets in clamping position during the grinding operation, means actuated by rotation of said head for moving said collects to releasing position after passing the grinding position, means including a clutch for rotating said head, ,devices for moving said clutch to its engaging or disengaging position as desired, and a cam for seating devices to be ground in said collets by rotation of said head.

In Witness whereof, I hereunto subscribe my name this 2nd day of Feb., A. D. 1920.

C. W. OLSON. 

